For beermaking, check out http://ww.realbeer.com. Realbeer is laid back and friendly. The brewing network is another good source of brewing information, but there are a lot of fart jokes and such that might put some folks off.
Another site to check out is the BJCP web site http://www.bjcp.org. The style guidelines will teach you a lot about what different kinds of beer there are and what to expect when you taste a sample of a good one. It is useful when pairing food, etc.